Utilizing exhaust-steam



(No'ModeL) R. H. F. 8:; N. H. SEWALL.

UTILIZING EXHAUST STEAM.

No. 372,713. Patented N v. 8, 1887.

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N. PETERS, Phulollilhcgrzphur. Washin ton. D. c.

NITED ATENT Fries.

ROBERT H. F. SEVALL AND NICHOLAS H. SEIVALL, OF SMITHLAND, LOUISIANA.

UTlLlZlNG EXHAUST- STEAM.

SPECIFICATION forming part of Letters Patent ItTo. 372,713, datedNovember 8, 1887.

Application filed November 15, 1886. .Serial No. 218,953.

To aZZ whom it may concern.-

Be it known that we, ROBERT H. F. SEWALL and NICHOLAS H. SEWALL, ofSmithland, Pointe Goupe parish, and State of Louisiana, have invented anew and useful Improvement in Utilizing Exhaust-Steam, of which thefollowing is a specification.

This invention is an improvementin steamengines, whereby theexhaust-steam may be utilized; and it consists in certain features ofconstruction and novel combinations of parts, as will be described andclaimed.

In the drawings,Figure 1 shows the improvement in connection with aboiler and a steamengine, and showing the improvements as adapted forutilizing only a part of the exhaust; and Fig. 2 is a detail Viewshowing the improvement as adapted for utilizing all the exhaust.

The boiler A and engine B may be of any suitable construction. Thecylinder 1) of the engine is connected by a pipe, 0, with a supplementalcylinder, D, made usually,as shown, of less crosssectional area than theengine-cylinder. Such pipe 0 receives the exhaust from the cylinder 1)and conducts the exhaust from such cylinder 1) to the supplementalcylinder D. The pipe 0 may open into the cylinder D, near one endthereof, as shown in Fig. 1, or about midway its ends, as shown in Fig.2.

A pipe, E, connects with the supplemental cylinder and serves as achannel,through which the exhauststeam is directed in its passage to theboiler. In the construction shown the pipe E leads into a blower, k,which is connected by pipe E with the boiler; but while such blower ispreferred it is manifest it might be omitted without departing from someof the broad principles of my invention.

The pipe E in Fig. 1 opens into the supple mental cylinder near one endthereof. In Fig. 2 the pipe E opens into the cylinder near one end, andhas a branch, 6, which opensinto the end of cylinder opposite that intowhich the main portion or stem of the pipe opens.

It will be noticed that the pipes E and C have check-valves l, theoperation of which will be understood from the drawings. The piston Foperates in cylinder D, and has its stem f suitably supported, usuallyon a cross-head, G, as shown.

(No model.)

' To the piston, and preferably through the medium of its stem and thecross-head, is connected one end of a lever, II, pivoted between itsends, and having its other end connected with some moving part of theengine, preferably the cross-head, as shown in Fig. 1.

In operation it will be seen that the exhauststeam is forced into thesupplemental cylinder, and thence by the piston F back into the boiler.Now it will be seen that the piston not only forces the exhaust towardor into the boiler, but produces a suction, which draws the exhaust intocylinder D and prevents any backpressure on the engine-cylinder.

Now, while we prefer the lever H, connected and operating as shown, itis'manifest that instead of such lever the piston of the supplementalcylinder might be run in direct line with the main shaft by means of aneccentric similar to the construction for operating the commonslide-valve.

In order to give the exhaust-steam proper force to enter the boiler A,and also to provide a means for, in part at least, feeding water to saidboiler A, we provide the pump I, which may be an ordinary steam-pumphaving a water-supply pipe,- I. From this pump a pipe, i, extends intothe pipe E, and is provided with a nozzle, J, pointing in the directionof 80 i the boiler A, forming an injector, which, by suction and directaction, gives the exhauststeam an impetus in such direction, and also,by means of the jet of water, in part at least, condenses suchexhaust-steam. The pump I, through pipe i,serves to inject a jet of coldwa ter into the pipe E and forces the steam toward the boiler. In itspassage between the pump I and the boiler A the steam and water passthrough a pump, K, preferably of a rotary form, as shown, which inpractice is given afast motion and operates to force the steam, &c-.,into the boiler.

Now it will be understood that, in addition to serving as a means foraiding in forcing exhaust-steam back into the boiler, the pipe E andpumps I and K may be used for forcing back into the boiler steam whichhas been employed for boiling sugar or other material.

Having thus described our invention, what we claim as new is- 1. Thecombination of the boiler, the sup the pipe between the boiler andsupplemental cylinder, substantially as set forth.

3. The combination, with the boiler A, of r 5 the pipes E E, thepiston-cylinder D, the pump K, the pump 1, and the pipe i, leading frompump 1. into pipe E, substantially as set forth.

ROBERT H. F. SEWALL. NICHOLAS H. SEWALL.

oted lever connected at one end with the pis- Witnesses: ton and at itsopposite end with the engine, the I. TORRAS, pump Land the pipe extendedtherefrom into W. O. NELSON.

